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quea 4 and 5

Asked by rbhatt16 12th October 2017, 5:00 PM
Answered by Expert
Question 4
retardation proportional to angular velocity. fraction numerator d omega over denominator d t end fraction space equals space minus space k omega 
if ω0 is initial angular velocity then the above differential equation gives the solution omega space equals space omega subscript 0 space e to the power of negative k t end exponent
since ω decreases exponetially it will become zero when t = ∞
Question 5
omega space equals space omega subscript 0 minus a ϕ space equals space omega subscript 0 plus alpha t
where α is angular acceleration
then solving for φ we will get phi equals space minus fraction numerator alpha t over denominator a end fraction
Answered by Expert 13th October 2017, 4:38 PM
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